Vintage Bicycle Value, and the determining of it, is always a crap shoot. There is just no way to tell how much a bicycle will fetch when people are asked to put their money up.
Low end and high end might not be appropriate designations for bicycles like the Sprint. It is a nice enough riding bicycle, rock stable but slow in response. The brakes are certainly adequate, but nothing compared to today's modern brake systems.
The bicycles are becoming thief magnets, for what ever that is worth.
Decide what the bicycle is worth to you. If it is in nice cosmetic condition and working properly, then a 170 dollars is not all that much to pay. To that add the cost to ship the bicycle to you, if there is any shipping costs involved.
On the other hand, if you want to get a bike for a lot less, spend a bit of time leaning
How To Find A Vintage Bike. I do this all the time and get an awful lot of bikes each year, including two of these lovely old
Raleigh roadsters...
Hope this is a help